Aisha K.
Mar 12, 2026
Clean layout and the results update instantly. Exactly what I needed for a quick planning check.
Unit Converters
Water Flow Rate: GPM to Liters per Minute
L/min = US gpm × 3.785411784.
1 US gpm = 3.785 L/min. A 2.5 gpm showerhead is 9.5 L/min. UK gallons are larger. Fixture laws care about the number on the aerator, not the pipe diameter.
US gallons per minute
gpm → L/min
9.46 L/min
2.5 gpm → 9.46 L/min. 10 gpm hose → 37.9 L/min.
- You typed
- 2.5 gpm
- One L/min is
- 0.26 gpm
- How it’s calculated
- L/min = US gpm × 3.785411784.
Plain-English guide
Terms & how it works
Confused by a field? Read the short definitions here while you use the tool.
US gallons per minute
The “US gallons per minute” value used in this tool’s formula. Adjust it to see results update live.
How this calculator works
1 US gpm = 3.785 L/min. A 2.5 gpm showerhead is 9.5 L/min. UK gallons are larger. Fixture laws care about the number on the aerator, not the pipe diameter. L/min = US gpm × 3.785411784. Example: 2.5 gpm → 9.46 L/min. 10 gpm hose → 37.9 L/min.
L/min = US gpm × 3.785411784.
Example: 2.5 gpm → 9.46 L/min. 10 gpm hose → 37.9 L/min.
When to use this GPM to L/min
Common use cases
- 1 US gpm = 3.785 L/min. A 2.5 gpm showerhead is 9.5 L/min. UK gallons are larger. Fixture laws care about the number on the aerator, not the pipe diameter.
- Sanity-check with this case: 2.5 gpm → 9.46 L/min. 10 gpm hose → 37.9 L/min.
- The relationship is: L/min = US gpm × 3.785411784.
Localized examples
- Unit Converters: the example on this page uses the same formula as the widget.
What you get
- Fields: US gallons per minute
- L/min = US gpm × 3.785411784.
- Example on the page: 2.5 gpm → 9.46 L/min. 10 gpm hose → 37.9 L/min.
How to Convert GPM to L/min Step-by-Step
- 1Enter US gallons per minute. Use the values you have, not a catalog average, unless that is all you know.
- 2L/min = US gpm × 3.785411784.
- 3Worked case: 2.5 gpm → 9.46 L/min. 10 gpm hose → 37.9 L/min.
- 4Check which dictionary the other person is using — US or UK, decimal or 1,024 — then trust the number.
Governing formula
L/min = US gpm × 3.785411784.
2.5 gpm → 9.46 L/min. 10 gpm hose → 37.9 L/min.
Example: set US gallons per minute = 2.5, then read the result.
Variable definitions
- value
US gallons per minute
The “US gallons per minute” field. Default 2.5; typical range 0–500.
- The conversion (L/min = US gpm × 3.785411784.) does not pick US vs UK gallons, SI vs binary megabytes, or Mach at altitude for you. Read the footnote on the page.
- Nothing here is uploaded for the calculation itself.
Frequently Asked Questions
Gallons per day ÷ 1,440 = gpm if the flow is steady, which municipal water is not.
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4.8
out of 5.0
4 reviews
Daniel R.
Feb 28, 2026
Very usable on mobile. Would love a save/export option later, but the math feels solid.
Priya S.
Feb 3, 2026
The FAQ section answered my questions before I even had to search. Smooth dark mode too.
Marcus L.
Jan 19, 2026
Simple inputs, clear outputs. This replaced three bookmarks I used to juggle.
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